West Bengal. Pollution Control Board. (2007). The clean air document: Final report of the WBPCB-ICEF project : pollution prevention and waste minimization of small scale industrial units in Kolkata metropolis area. West Bengal Pollution Control Board, India-China Environment Facility.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিWest Bengal. Pollution Control Board. The Clean Air Document: Final Report of the WBPCB-ICEF Project : Pollution Prevention and Waste Minimization of Small Scale Industrial Units in Kolkata Metropolis Area. West Bengal Pollution Control Board, India-China Environment Facility, 2007.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিWest Bengal. Pollution Control Board. The Clean Air Document: Final Report of the WBPCB-ICEF Project : Pollution Prevention and Waste Minimization of Small Scale Industrial Units in Kolkata Metropolis Area. West Bengal Pollution Control Board, India-China Environment Facility, 2007.